From 46702f68f98244f7384d6ac1742a452f0d7a2610 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 15 Mar 2012 01:55:54 -0400
Subject: [PATCH] avoid changing NaNs in sqrt (x86 asm) to satisfy c99 f.9
 recommendation

---
 src/math/i386/sqrt.s | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/math/i386/sqrt.s b/src/math/i386/sqrt.s
index 8289d094..33157044 100644
--- a/src/math/i386/sqrt.s
+++ b/src/math/i386/sqrt.s
@@ -10,6 +10,10 @@ sqrt:	fldl 4(%esp)
 	and $0x7ff,%ecx
 	cmp $0x400,%ecx
 	jnz 1f
+	mov 8(%esp),%ecx
+	or $0xffff8000,%ecx
+	inc %ecx
+	jz 1f
 	and $0x200,%eax
 	sub $0x100,%eax
 	sub %eax,(%esp)
-- 
GitLab